EP0653577B1 - Hydraulischer Stossdämpfer - Google Patents

Hydraulischer Stossdämpfer Download PDF

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Publication number
EP0653577B1
EP0653577B1 EP94202967A EP94202967A EP0653577B1 EP 0653577 B1 EP0653577 B1 EP 0653577B1 EP 94202967 A EP94202967 A EP 94202967A EP 94202967 A EP94202967 A EP 94202967A EP 0653577 B1 EP0653577 B1 EP 0653577B1
Authority
EP
European Patent Office
Prior art keywords
extruded tube
tubular portion
mounting means
tube
forming
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94202967A
Other languages
English (en)
French (fr)
Other versions
EP0653577A1 (de
Inventor
Gary Chris Fulks
Manuel Tornell Barbosa
Nicholas Jones
Miquel Candela Garcia
Francisco Javier Sanchez Jimenez
Jose Ignacio Membrillera Gorostidi
Antonio Perez De La Lastra Arjona
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Delphi Automotive Systems Espana SA
Delphi Automotive Systems France
Original Assignee
Delphi Automotive Systems Espana SA
Delphi Automotive Systems France
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Delphi Automotive Systems Espana SA, Delphi Automotive Systems France filed Critical Delphi Automotive Systems Espana SA
Priority claimed from US08/324,467 external-priority patent/US5607035A/en
Publication of EP0653577A1 publication Critical patent/EP0653577A1/de
Application granted granted Critical
Publication of EP0653577B1 publication Critical patent/EP0653577B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
    • B60G15/02—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring
    • B60G15/06—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper
    • B60G15/07—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper the damper being connected to the stub axle and the spring being arranged around the damper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G13/00—Resilient suspensions characterised by arrangement, location or type of vibration dampers
    • B60G13/001—Arrangements for attachment of dampers
    • B60G13/005—Arrangements for attachment of dampers characterised by the mounting on the axle or suspension arm of the damper unit
    • B60G13/006—Arrangements for attachment of dampers characterised by the mounting on the axle or suspension arm of the damper unit on the stub axle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
    • B60G15/02—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring
    • B60G15/06—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper
    • B60G15/062—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper the spring being arranged around the damper
    • B60G15/063—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper the spring being arranged around the damper characterised by the mounting of the spring on the damper
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F16F9/3235—Constructional features of cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3271—Assembly or repair
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/54—Arrangements for attachment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/30—Spring/Damper and/or actuator Units
    • B60G2202/31—Spring/Damper and/or actuator Units with the spring arranged around the damper, e.g. MacPherson strut
    • B60G2202/312—The spring being a wound spring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/12—Mounting of springs or dampers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/12—Mounting of springs or dampers
    • B60G2204/124—Mounting of coil springs
    • B60G2204/1242—Mounting of coil springs on a damper, e.g. MacPerson strut
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/12—Mounting of springs or dampers
    • B60G2204/129—Damper mount on wheel suspension or knuckle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/43—Fittings, brackets or knuckles
    • B60G2204/4304—Bracket for lower cylinder mount of McPherson strut
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/40—Constructional features of dampers and/or springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/40—Constructional features of dampers and/or springs
    • B60G2206/41—Dampers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/40—Constructional features of dampers and/or springs
    • B60G2206/42—Springs
    • B60G2206/422—Accumulators for hydropneumatic springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/80—Manufacturing procedures
    • B60G2206/81—Shaping

Definitions

  • This invention relates to a method of forming a hydraulic damper.
  • hydraulic damper is meant a suspension strut or shock absorber.
  • a hydraulic damper for use in the suspension system of a motor vehicle typically comprises a tube; a piston sealably slidably mounted in the tube and attached to a piston rod, the piston separating a compression chamber from a rebound chamber within the tube; a compression stroke valve mounted on the piston which allows fluid flow from the compression chamber to the rebound chamber; and a rebound stroke valve mounted on the piston which allows fluid flow from the rebound chamber to the compression chamber.
  • the piston rod extends out of the tube at one end thereof, and is sealably slidably mounted in that one end.
  • Such hydraulic dampers either comprise an inner tube and an outer tube (sometimes referred to as a twin tube damper) in which the piston sealably slides in the inner tube, or comprise a single tube (sometimes referred to as a monotube damper).
  • each tube of a hydraulic damper It is usual practice to form the or each tube of a hydraulic damper by rolling a sheet of steel and welding together the adjacent longitudinal edges. External parts, such as the spring seat and the mounting bracket or steering knuckle, which are also formed from steel, are then welded to the single tube or the outer tube. The other end of the tube is sealed closed by welding on an end plate or by arc-heating and rolling the tube end, and the internal components of the suspension strut (such as those mentioned above) are inserted into the tube by way of the one end thereof, which is then sealed closed.
  • the use of several welding steps has disadvantages in that welds are time consuming operations. Further, welds are susceptible to corrosion. Still further, the use of steel has disadvantages with regard to weight.
  • DE-U-1931028 discloses a method in accordance with the preamble of claim 1.
  • a method of forming a hydraulic damper in accordance with the present invention comprises extruding a tube of aluminium or aluminium alloy; forming a mounting means of aluminium or aluminium alloy; securing the mounting means to the extruded tube; and closing an end of the extruded tube by flame heating the end of the extruded tube and rolling the flame heated end.
  • This invention removes the steps of welding, thereby removing time consuming operations. Further the use of aluminium or aluminium alloy has advantages with regard to weight when compared to previously known arrangements.
  • the hydraulic damper 10 shown in Figure 1 is of the twin tube damper type, and comprises an outer tube 12, and an inner tube 14 substantially coaxial with the outer tube on an axis L.
  • the outer tube 12, and preferably the inner tube 14, are formed from extruded aluminium or aluminium alloy and have a substantially constant cross-section along their length.
  • the hydraulic damper 10 further comprises conventional components such as a piston assembly 16, a piston rod 18 having a longitudinal axis on axis L, a compensation valve 20, and a rod guide 22.
  • the piston assembly 16 includes a compression valve and a rebound valve (not shown).
  • the piston assembly 16, the compensation valve 20 and the rod guide 22 may be any suitable conventional design well known to those skilled in the art, and will not be described in detail.
  • the inner tube 14 is substantially closed at one end 24 by the compensation valve 20, and is substantially closed at the other end 26 by the rod guide 22.
  • the outer tube 12 is closed at one end 28 by flame heating and rolling the outer tube walls, and is substantially closed at the other end 30 (the open end) by the rod guide 22 and by spin closing the end 30 of the outer tube.
  • An example of apparatus suitable for spin closing is disclosed in our GB patent application no. 9412806.3 (2290736 A), published after the priority date of the present application, in which a pair of rollers initially push a portion of the outer tube at the open end over at approximately 45°, and a second pair of rollers then push a section of the portion over at approximately 90°, whilst the outer tube is spinning about its longitudinal axis.
  • the piston rod 18 extends through, and makes a sealing sliding fit with the rod guide 22.
  • the piston assembly 16 makes a sealing sliding fit with the inner surface 32 of the inner tube 14.
  • the piston rod 18 is secured to the piston assembly 16 by a nut 34 or any other suitable means.
  • the piston assembly 16 divides the inner area of the inner tube 14 into a rebound chamber 36 and a compression chamber 38.
  • the area between the inner tube 14 and the outer tube 12 defines a compensation chamber 40.
  • the rebound and compression chambers 36 and 38 are substantially filled with fluid to damp reciprocating movement of the piston assembly 16 and piston rod 18 along axis L relative to the outer and inner tubes 12 and 14.
  • the compensation chamber 40 is partly filled with fluid and acts as a reservoir for the fluid in the rebound and compression chambers 36 and 38.
  • the hydraulic damper 10 is mounted in a motor vehicle (not shown) using mounting means in the form of a mounting bracket 46.
  • the mounting bracket 46 ( Figure 2) is extruded from aluminium or aluminium alloy to integrally form a tubular portion 43 with a pair of spaced arms 42 which are substantially parallel.
  • the tubular portion 43 has an internal diameter which is sized to make a close sliding fit on the outer tube 12. Pairs of holes 44 are cut in each arm 42 to form mounting apertures for the mounting bracket 46.
  • the mounting bracket 46 is then slid into position on the outer tube 12, and is secured in place by pressing or punching a tangentially extending groove 47 in the tubular portion 43 and the outer tube 12 as shown in Figures 3 and 4.
  • the groove 47 extends in a direction which is substantially at right angles to the axis L.
  • a spring seat 50 may be attached to the outer tube 12 as shown in Figure 3 as follows.
  • a first external, circumferentially extending, bead 48 is formed in the outer tube 12.
  • the spring seat 50 (of aluminium or aluminium alloy) is formed by pressing or casting and includes a cylindrical section 52 which has an internal shape and size which is substantially the same as the external shape and size of the outer tube 12 - that is, the cylindrical section can make a close sliding fit on the outer tube.
  • the spring seat 50 is slid onto the outer tube 12, with the tube passing through the cylindrical section 52 until one end 54 of the cylindrical section rests on the first bead 48.
  • a second external, circumferentially extending, bead 56 is then formed in the outer tube 12 adjacent the other end 58 of the cylindrical section 52 to secure the spring seat 50 on the outer tube.
  • the external circumferentially extending beads 48,56 are preferably formed as shown in Figure 5 by positioning one end of the extruded tube 12 in a die 60 having a correspondingly shaped closed bore 62, and by positioning a pair of substantially identical dies 64 having substantially semi-circular grooves 66 therein around the extruded tube but slightly spaced from the die 60. The dies 64 are then moved towards one another to grip the extruded tube 12 and the die 60 moved towards the dies 64 to form the bead 48,56, the relative movement being indicated by the arrows in Figure 5.
  • the spring seat 50 may be secured by sliding the spring seat into position and then forming the two beads, or by forming two rings of external dimples rather than beads, or by rivets, or any other suitable alternative arrangement. Either prior to, or after, attachment of the spring seat 50, the one end 28 of the outer tube 12 is closed by flame heating the end of the outer tube, and then rolling over the end. Having formed the outer tube 12 with the mounting bracket 46 and the spring seat 50 secured thereto, and having closed the one end 28, the other components (as described above) of the hydraulic damper 10 can then be assembled therein.
  • the mounting bracket could be formed as shown in Figure 2, but with the tubular portion 43 having an internal diameter which is slightly smaller than the external diameter of the extruded tube 12.
  • the mounting bracket 46 is attached to the extruded tube by heating the mounting bracket to cause the tubular portion 43 to expand, sliding the mounting bracket into position on the extruded tube 12, and then cooling the mounting bracket such that the tubular portion contracts and frictionally grips the extruded tube.
  • the mounting bracket 46 may be attached by adhesive (in a similar manner to that described below with regard to Figure 8).
  • the external surface of the extruded tube 12 may be formed with longitudinally extending ribs and the internal surface of the tubular portion 43 may be formed with corresponding grooves (or vice versa) to correctly aligned and/or position the mounting bracket 46 on the extruded tube - in a similar manner to that described below with regard to Figures 6 and 7.
  • the external surface of the extruded tube 12 and the internal surface of the tubular portion 43 may be provided with screw threads, and the mounting bracket 46 may be attached to the extruded tube by screw threading.
  • the mounting bracket 46 may be secured in position between a pair of external circumferentially extending beads formed in the outer tube 12 as described above in relation to the fixing of the spring seat 50.
  • the mounting means is in the form of a steering knuckle 90 which is cast from aluminium or aluminium alloy.
  • the steering knuckle 90 comprises a tubular portion 92 which is open at both ends, although one end may be closed to form an end cap for the extruded tube.
  • the extruded tube 94 is formed with two pairs of external, longitudinally (axially) extending, outwardly directed, ribs 96,98, ( Figure 7) with the ribs of each pair being diametrically opposed, and the pairs being set at right angles to one another.
  • the ribs 96,98 of each pair have substantially the same cross-sectional shape and area, but different from the cross-sectional shape and area of the other pair of ribs.
  • the tubular portion 92 of the steering knuckle 90 has correspondingly shaped and sized grooves 100,102 formed in its internal surface 104. This arrangement allows the steering knuckle 90 to make a close sliding fit with the extruded tube 94, and also provide means for correctly locating the steering knuckle relative to the extruded tube.
  • a part of one or more of the ribs 96,98 may be removed and a part of the corresponding groove or grooves 100,102 may be omitted to provide one or more pairs of engaging shoulders 106 which act as a stop to again correctly locate the steering knuckle 90 on the extruded tube 94.
  • the steering knuckle 90 may be attached to the extruded tube 94 by frictional grip, by heating the tubular portion 92, positioning the tubular portion on the extruded tube, and then cooling the tubular portion. Without the presence of the ribs 96,98 and the grooves 100,102, the steering knuckle may be attached to the extruded tube by screw threading.
  • the steering knuckle 90 is attached to the extruded tube 94 by adhesive, with or without the presence of the ribs 96,98 and grooves 100,102, as described below with reference to Figure 8.
  • a steering knuckle 110 has a tubular portion 112 cast from aluminium or aluminium alloy.
  • One end 114 of the tubular portion 112 is formed with a tapered surface 116.
  • Two longitudinally (axially) extending grooves 118 are formed in the inner surface 120 of the tubular portion 112, the grooves being substantially diametrically opposed and of predetermined height h.
  • a hole 122 is cut through the tubular portion 112 to open into each groove 118.
  • the extruded tube 124 of aluminium or aluminium alloy has a pair of external longitudinally extending ribs 126 which are cut to form a tapered end 128.
  • the tapered end 128 and the tapered surface 116 on the tubular portion 112 define shoulders which engage to provide a stop for locating the steering knuckle 110 on the extruded tube 124.
  • a number of circumferentially extending grooves 130 are cut in the outer surface 132 of the extruded tube 124 adjacent the tapered end 128 over a predetermined height which is substantially the same as the height h of the grooves 118 in the tubular portion 112.
  • the grooves 130 have a predetermined depth d.
  • the steering knuckle 110 is secured in position by injecting a suitable adhesive, under pressure, into one of the holes 122 in the tubular portion 112 and along the corresponding groove 118.
  • the pressure forces the adhesive to travel around and fill the grooves 130, pass into the opposite groove 118, and then extrude out through the corresponding hole 122.
  • the depth d of the grooves 130 is determined to provide the necessary working properties (strength) for the adhesive.
  • any other suitable means for providing a space between the inner surface of the tubular portion and the outer surface of the extrude tube may be used to provide the required working depth for the adhesive.
  • the other end 30 of the extruded tube 12 may be closed by a threaded cap as an alternative arrangement to spin closing.
  • the extruded tube and the mounting means are formed from aluminium alloy conforming to BS 6082 and which comprises, by weight percentage, 0.70 to 1.3% Si, 0.5% Fe, 0.1% Cu, 0.4 to 1.0% Mn, 0.6 to 1.2% Mg, 0.25% Cr, 0.2% Zn, 0.1% Ti, 0.05 to 0.15% impurities, with the remainder being aluminium.
  • aluminium alloy conforming to BS 6082 and which comprises, by weight percentage, 0.70 to 1.3% Si, 0.5% Fe, 0.1% Cu, 0.4 to 1.0% Mn, 0.6 to 1.2% Mg, 0.25% Cr, 0.2% Zn, 0.1% Ti, 0.05 to 0.15% impurities, with the remainder being aluminium.
  • Other compositions of aluminium alloy may be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vehicle Body Suspensions (AREA)
  • Fluid-Damping Devices (AREA)
  • Body Structure For Vehicles (AREA)
  • Vibration Dampers (AREA)

Claims (14)

  1. Verfahren zum Herstellen eines hydraulischen Dämpfers, das umfaßt, daß ein Rohr (12) aus Aluminium oder einer Aluminiumlegierung extrudiert wird, daß ein Montagemittel (46) aus Aluminium oder einer Aluminiumlegierung hergestellt wird und daß das Montagemittel an dem extrudierten Rohr befestigt wird, dadurch gekennzeichnet, daß ein Ende (28) des extrudierten Rohres durch Flammenerwärmen des Endes des extrudierten Rohres und Walzen des flammenerwärmten Endes verschlossen wird.
  2. Verfahren nach Anspruch 1, wobei das Montagemittel (46) durch Extrusion hergestellt wird.
  3. Verfahren nach Anspruch 1, wobei das Montagemittel (90) durch Gießen hergestellt wird.
  4. Verfahren nach einem der Ansprüche 1 bis 3, wobei an dem Montagemittel (46) ein rohrförmiger Teil (43) hergestellt wird, der über einem Teil des extrudierten Rohres (12) liegt und an diesem befestigt wird.
  5. Verfahren nach Anspruch 4, wobei das Montagemittel (46) an dem extrudierten Rohr (12) befestigt wird, indem eine sich tangential erstreckende Nut (47) in das rohrförmige Teil (43) und das extrudierte Rohr gestanzt oder gepreßt wird.
  6. Verfahren nach Anspruch 4, wobei das Montagemittel (90) an dem extrudierten Rohr (12) befestigt wird, indem der rohrförmige Teil (92) erwärmt wird, der rohrförmige Teil in der erforderlichen Position an dem extrudierten Rohr angeordnet wird und der rohrförmige Teil abgekühlt wird, um einen Reibgriff zwischen dem rohrförmigen Teil und dem extrudierten Rohr herzustellen.
  7. Verfahren nach Anspruch 4, wobei das Montagemittel (70) an dem extrudierten Rohr (12) befestigt wird, indem ein Schraubengewinde (74, 78) an dem extrudierten Rohr und in dem rohrförmigen Teil (76) hergestellt wird und der rohrförmige Teil auf das extrudierte Rohr geschraubt wird.
  8. Verfahren nach Anspruch 4, wobei das Montagemittel (110) an dem extrudierten Rohr (124) befestigt wird, indem ein Haftmittel zwischen dem rohrförmigen Teil (112) und dem extrudierten Rohr aufgebracht wird.
  9. Verfahren nach Anspruch 8, das umfaßt, daß eine Anzahl sich in Umfangsrichtung erstreckende Nuten (130) mit vorbestimmter Tiefe in dem extrudierten Rohr (124) hergestellt wird und daß das Haftmittel in die Nuten eingeführt wird.
  10. Verfahren nach Anspruch 9, das umfaßt, daß zwei sich axial erstreckende Nuten (118) in der Innenfläche des rohrförmigen Teils (112) hergestellt werden und daß ein Durchgangsloch (122) hergestellt wird, das sich mit jeder Nut verbindet, wobei das Haftmittel durch ein Loch und eine axiale Nut in die Umfangsnuten (130) in dem extrudierten Rohr eingeführt wird.
  11. Verfahren nach Anspruch 4, wobei das Montagemittel an dem extrudierten Rohr befestigt wird, indem ein äußerer, sich in Umfangsrichtung erstreckender Wulst in dem extrudierten Rohr hergestellt wird, der rohrförmige Teil auf das extrudierte Rohr und in Eingriff mit dem Wulst geschoben wird und ein zweiter äußerer, sich in Umfangsrichtung erstreckender Wulst in dem extrudierten Rohr hergestellt wird, um den rohrförmigen Teil zwischen den beiden Wülsten einzuschließen.
  12. Verfahren nach einem der Ansprüche 1 bis 11, wobei das Montagemittel (46) so hergestellt wird, daß es einen Montageträger festlegt, der mindestens einen Arm (42) aufweist, um den Montageträger an einem Kraftfahrzeug zu befestigen.
  13. Verfahren nach einem der Ansprüche 1 bis 11, wobei das Montagemittel als ein Achsschenkel (90) hergestellt wird.
  14. Verfahren nach einem der Ansprüche 1 bis 13, wobei das extrudierte Rohr (94) eine oder mehrere äußere, sich in Längsrichtung erstreckende Rippen (96, 98) aufweist, die mit entsprechenden Nuten (100, 102) in Eingriff stehen, die in dem Montagemittel (90) hergestellt sind, um das Montagemittel an dem extrudierten Rohr in einer vorbestimmten Position anzuordnen.
EP94202967A 1993-11-09 1994-10-13 Hydraulischer Stossdämpfer Expired - Lifetime EP0653577B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9323047 1993-11-09
GB939323047A GB9323047D0 (en) 1993-11-09 1993-11-09 A method of forming a suspension strut
US08/324,467 US5607035A (en) 1994-10-13 1994-10-17 Hydraulic damper

Publications (2)

Publication Number Publication Date
EP0653577A1 EP0653577A1 (de) 1995-05-17
EP0653577B1 true EP0653577B1 (de) 1998-08-26

Family

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Family Applications (3)

Application Number Title Priority Date Filing Date
EP94202968A Expired - Lifetime EP0653578B1 (de) 1993-11-09 1994-10-13 Verfahren zur Herstellung eines hydraulischen Stossdämpfers
EP94202967A Expired - Lifetime EP0653577B1 (de) 1993-11-09 1994-10-13 Hydraulischer Stossdämpfer
EP94202965A Expired - Lifetime EP0653576B1 (de) 1993-11-09 1994-10-13 Verfahren zum Formen eines hydraulischen Dämpfers

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US (1) US5620172A (de)
EP (3) EP0653578B1 (de)
DE (3) DE69412751T2 (de)
ES (3) ES2119068T3 (de)
GB (4) GB9323047D0 (de)

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Also Published As

Publication number Publication date
EP0653578A1 (de) 1995-05-17
ES2119958T3 (es) 1998-10-16
US5620172A (en) 1997-04-15
ES2119068T3 (es) 1998-10-01
GB9420640D0 (en) 1994-11-30
DE69411853T2 (de) 1998-12-03
GB2283713B (en) 1997-04-09
GB2283712A (en) 1995-05-17
EP0653576B1 (de) 1998-07-22
GB2283713A (en) 1995-05-17
DE69411854D1 (de) 1998-08-27
DE69411854T2 (de) 1998-12-03
DE69412751T2 (de) 1999-01-14
DE69412751D1 (de) 1998-10-01
GB2283711B (en) 1997-04-09
GB2283711A (en) 1995-05-17
GB2283712B (en) 1997-04-09
ES2119069T3 (es) 1998-10-01
GB9323047D0 (en) 1994-01-05
EP0653576A1 (de) 1995-05-17
EP0653577A1 (de) 1995-05-17
EP0653578B1 (de) 1998-07-22
GB9420639D0 (en) 1994-11-30
DE69411853D1 (de) 1998-08-27
GB9420637D0 (en) 1994-11-30

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